Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d50ed6bdde988d7…

MALICIOUS

PDF

32.6 KB Created: 2020-10-06 23:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0289b09176cf88814fc63e4dcac43228 SHA-1: eb1d75a347d829689378243a83a99abd8cf49018 SHA-256: 5d50ed6bdde988d7e14d17d1f73693f245496e25a3f39e9be0455d30d4c4a1f9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=love+me+like+you+do+song+lyrics+karaoke In PDF document text
    • http://files.bluemountainseimei.com/uploads/1/3/2/6/132681832/7839457.pdfIn PDF document text
    • http://files.lorgan.fr/uploads/1/3/1/6/131636991/xasatepopavobiwane.pdfIn PDF document text
    • http://files.librariansonbikes.com/uploads/1/3/1/8/131856222/9678061.pdfIn PDF document text
    • http://puxojaxav.bassanqc.com/uploads/1/3/1/1/131164131/gasogu.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/61603875174.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/libemozuwodibovutaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/221bd648-599c-4ae5-8574-2308a3fbbb62/39106475941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a943bae0-9643-42c4-a66d-487ed601ba01/zidokuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cd97c6-0fb8-4f66-9fda-2b49e6f8b91d/47919333141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b685ee8-9ab3-4f6d-92e2-e7ccbe79817f/7800011765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ebe28f-1b84-4683-99c7-f209a2591d9f/moluxunifinizepolavegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/plant_cell_nucleus_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8852/2650/files/diablo_3_tier_list_season_16.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/csr_classic_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4197/0583/files/11746937190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/michael_kors_petite_norie_mother_of_pearl_dial_ladies_watch.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C7 5424 bytes
SHA-256: 28f6895050a059b69c171f90a7c1a90d09cdd1d1175de4e97b51293d2a9a6221
font_01_sfnt_off00005737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 8984 bytes
SHA-256: 25167a6e1edbe3c00c112bf987aceee9b43b1f257675a8eb2c016f72184a9c74

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